Pump device



Nov. 6, 1956 Original Filed Nov. 16, ,1950

W. E. 'BUCKLEY PUMP DEVICE I Pa 3 FIG. I. 28/

2 Sheets-Sheet 1 IN VEN TOR. WILL/AM E. BUCKLE. y

ATTOIZ Nays 1956 w. E. BUCKLEY 2,769,398

PUMP DEVICE Original Filed Nov.. 16, 1950 2 Sheets-Sheet 2 INVENTOR. W/LL AM BUCKLE) BY WQAM PUMP DEVICE William E. Buckley, Huntington, N. Y., assignor to The Cornell Machine Company, New York, N. Y., a corporation of Ohio Original application November 16, 1950, Serial No. 195,965. Divided and this application February 15, 1952, Serial No. 271,671

2 Claims. (Cl. 103-160) My invention relates to a new and improved metering pump device, which is used for delivering a fluid at a regulated rate.

This application is a division of my application Serial No. 195,965, filed in the United States Patent Oflice on November 16, 1950, issued as Patent No. 2,737,961, on March 13, 1956.

According to this invention I use a pump which is largely of a standard type, and I modify this pump as later described herein, in order accurately to regulate its output.

Other objects of my invention are stated in the annexed description and drawings which illustrate a preferred embodiment thereof.

Fig. 1 is a vertical section, partially in elevation, which shows the improved metering pump device whereby the output of said device can be adjusted without changing the speed of rotation of the metering pump.

Fig. 2 is an enlarged detail sectional view of the casing of one of the vernier adjustments which are utilized in the device.

Fig. 3 is a top plan view of Fig. 2.

Fig. 4 is a bottom plan view of Fig. 2.

Fig. 5 is an exploded view which shows certain important parts of a standard pump which is utilized in this embodiment.

Fig. 5 shows certain important parts of a pump which is described in several United States patents, including No. 2,018,692, datde October 29, 1935; No. 2,018,693, dated October 29, 1935; No. 2,247,922, dated July 1, 1941; and No. 2,348,679, dated May 9, 1944.

These patents also disclose alternate pumps which can be used in this invention.

These pumps, without the modification later described herein, in which a manual control is used, are wellknown commercially and are fully described in various publications issued by the manufacturers thereof.

Fig. 5 shows the usual pump body or casing 1, which has a longitudinal outer face 17, and a cylindrical inner longitudinal face 1b. The usual rotor 3 is fixed to the usual longitudinal rotor shaft 2. Said rotor shaft 2 and said cylindrical face 112 have a common longitudinal axis. The rotor 3 has the usual ports 3a. These ports 3a are transversely diametrically opposed relative to the axis of shaft 2. Only one of these ports is shown in Fig. 5. This rotor 3 has the usual longitudinal recess or slot, which extends up to the front wall of said rotor. The rotor 3 has the usual imperforate transverse rear wall 3b. The usual channel-shaped piston, which has longitudinal walls 4a and 4, is transversely slidable in said longitudinal slot of rotor 3, in a direction perpendicular to the axis of shaft 2. This channel-shaped piston is closed at its rear end, where the longitudinal walls 4a and 4 are connected by a rear imperforate transverse wall, which slidingly abuts wall 3b of the rotor 3.

The usual shuttle S fits longitudinally slidably between the piston walls 4a and 4 and said shuttle S is slidable in unison with said channel-shaped piston in a direction nitecl States PatentO transverse to the axis of shaft 2 in order to exert the usual pumping action. The shuttle S has a front wall which has a median longitudinal recess 5a.

When these parts are assembled, the outer periphery of the rotor 3 fits against the inner face 1b, save where said outer periphery of rotor 3 is interrupted by the openings of its two ports and by its front longitudinal recess. The piston and shuttle are then wholly located in the pump body or casing. When the parts are assembled, the shuttle S is located between the walls 4 and 4a.

The casing 1 has the usual discharge port 18 and it also has the usual inlet port, which is not shown. In some models of this type of pump, the inlet port and the outlet or discharge port have a common axis. In other models of this type of pump, the inlet port and the discharge port 18 have different respective axes, which may be in the same plane and perpendicular to each other.

Fig. 5 shows the usual plate 6, which is used as a pressure control plate in the unmodified commercial pump. This plate 6 has six holes lcc, which register with the six recesses 1c of the front face In of easing 1. Bolts or other fastening members are extended through openings into recesses 10, in order to clamp plate 6 against the planar front face In of casing 1. Plate 6 has front and rear planar and parallel faces.

The front face 1a of casing 1 has four additional recesses In, which register with holes D of plate 6. Dowels are passed through holes D into recesses 1d, in order to ensure proper assembly.

The standard pressure control plate 6 in said unmodified pump has four ports 7, through which liquid can pass from casing 1 to a pressure control, which automatically stops the pumping action when the pressure in the discharge line of the unmodified pump exceeds a selected outlet pressure. When the pump is modified according to this invention to be used as a metering pump, said pressure control is not used, and the ports or holes 7 of pressure control plate 6 are closed by plugs 8.

The usual control arm or lever 9 is pivoted to plate 6 by a pivot pin 9b. The usual rod 9a extends through the usual hole H of plate 6. This hole H is of greater diameter than rod 9a. When the parts are assembled, the rod 9a extends into the recess 5a of shuttle S in the usual manner.

By turning control lever 9 about the axis of its pivot pin 9b, the rod 9a and shuttle S can be adjusted, so that the common axis of rod 9a and of recess 5a, which is the longitudinal median axis of shuttle S, is either coincident with the axis of shaft 2, or offset transversely from the axis of shaft 2. When these axes are thus coincident, the pump rotates idly, without discharging any liquid. When these axes are relatively offset, liquid is discharged at a rate which depends upon the amount of offset and the velocity of rotation. The two openings 3a in the side of the rotor 3 operate as ports. In this type of pump, there are four pumping or discharge strokes for each revolution of the rotor 3. The hole H is suificiently large to permit the turning of control lever 9 through the desired angle of adjustment.

The usual pin or rod 10 extends longitudinally and forwardly from control lever 9.

The usual gasket head or cover 11 has a recess in its rear face. Said head or cover 11 is fixed in the usual manner to pump casing 1 by bolts or other fastening members which extend through holes of head 11 and respective alined holes lcc, to enter respective recesses 1c. The head 11 has the usual cylindrical guide 49, and the usual longitudinal shell 11a.

The usual cylindrical plunger 46 is slidably guided in the guide 49. As shown in Fig. l, a cross-head 47 is located in a bore of the plunger 46, between the top and bottom of plunger 46, in the usual manner. This crossl atented Nov. 6, 1956.

3 head 47 has a bore 48a. A pin 47a extends through bore 48a. Said pin 47a has a bore 48. When the parts are assembled, the pin extends through bore 48. Plunger 46 is thus connected to the plate or lever 9.

The lever 9 has the usual plate 54. The usual helical control spring 15, which acts as a torsion spring, extends through the shell lla of head 11 when the parts are assembled. When thus assembled, the inner hook-end of control spring 15 catches in the recess of plate 54.

Spring cap 15a and gasket 16 are assembled with shell 11a in the usual manner.

In the conventional pump of this type, the control spring 15 holds the plunger 46 and the pin or rod 9a in the selected position, in which the pump operates at maximum capacity, that is, the control spring 15 exerts a torsion on the plate or lever 9, so as to turn it to the position of maximum pump capacity. The plunger 46 and lever 9 and spring 15 are thus interconnected. All this is well-known.

The disc 12 is fixed to the front end of spring 15 in the usual manner. By turning disc 12, the torsion of control spring 15 can be regulated. When disc 12 has been turned to selected position, it is releasably locked to shell 11a by pin 14, in the usual manner. it the discharge line of the unmodified pump is closed, the pressure of the liquid actuates the plunger 46 in the unmodified pump, so as to turn lever 9 to a position in which the pumping action is zero.

The lower body 25} of the new and improved control for each metering pump is identical with an upper body 19. As shown in Fig. 2, this lower body 20 has a longitudinal passage 21 which is internally threaded. At its bottom end, this passage 21 has an enlargement 22 which has a smooth cylindrical wall. The lower end of the body 20 is provided with a longitudinal opening or recess 23 which has a smooth cylindrical wall. This recess 23 communicates with a cylindrical passage 24 which is also internally threaded and which is of smaller diameter than recess 23 and passage 22. This reduced passage 24. communicates through a passage 25 with the passage 22. A continuous opening is therefore provided between the top and bottom of the body 20.

As shown in Fig. 2, the body 20 is also provided at one end thereof with a lateral slot or recess 26 which extends into the threaded passage 21. Communicating with this lateral slot 26, there is a longitudinal and internally threaded recess 27 of body 211, which is alined with a longitudinal bore 27a of body 2t). An outer sleeve a is mounted turnably on the intermediate sleeve 28a.

Said intermediate sleeve 28a is fixed by any suitable fastening means to the lower part of the body 20. Said outer sleeve 30a is fixed to the hand wheel 41 so that hand wheel 41 and outer sleeve 30a turn in unison. The intermediate sleeve 28a extends from the flange 28b of the body 21) up to the flange 280 of said body 29. The lower part of the outer sleeve 30 turnably fits against and overlaps the upper part of the intermediate sleeve 28a and parts of a Vernier scale are provided at these overlapping parts.

The rod 39 has an externally threaded portion 39a, which engages the thread of the upper passage 21 of the body 29. An extension 39b of rod 39, which does not have an external thread, extends below the bottom recess 23 of the body 20. The bottom end-part of the extension 3912 is internally threaded. A tip 44 is turnably connected to the extension 39b by means of a bearing screw which is fixed by means of an external thread to the internal thread at the bottom recess of the extension 3%. The tip 44 may optionally have a slight and limited up-and-down movement relative to the member 395. The upper end of the rod 39 is externally threaded so that a nut 40 provides an assembly between the rod 39 and the knurled hand-wheel 41. A coupling collar 42 is connected to the hand-wheel 41 by means of a standard pin 43. This pin 43 extends through a longitudinal bore of the coupling collar 42 and said pin 43 has an externally threaded end which engages an internally threaded recess of the hand wheel 41. The usual head 43a is provided on the pin 43.

The assembly between the sleeve 39a and the hand wheel 41 is maintained by means of lateral pins, like the pins Fa, which extend through openings of the sleeve 30a into a flange of the hand wheel 4-1. Any suitable form of assembly may be used.

The top hand wheel 31 is fixed to an outer sleeve 39 by means of pins Fa which extend laterally through the upper and outer sleeve 30 and into a flange of the upper hand wheel 31. This is similar to the connection between the lower hand wheel 41 and the lower sleeve 31 n.

The upper half of the assembly of Fig. 1 has a rod F which is identical with the rod 39. This upper rod F has a threaded part 32a which is identical with the threaded extension 39a. As in the lower half of the unit, the upper threaded part 32a terminates at the top of the enlargement 22a which corresponds to the enlarge ment 22. Corresponding to the extension 39b, said upper rod has an extension 32 which extends through the bottom recess 23a which corresponds to the recess 23. This extension 32 is connected by a coupling collar 33 and fastening members 33a, to the rod 36 which is fixed to an upper extension of the coupling collar 42 by means of transverse pins Fa.

A liquid-tight assembly is provided by one or more packing rings which are tightened by packing nut 51.

The packing ring or rings are located in the lower passage 25 and the packing nut 51 engages the internal thread of the passage 24.

Since there is no passage of liquid through the upper part of the assembly of Fig. 1, these packing members are omitted from the upper part of Fig. 1. The pin 26a locks the sleeve 30 relative to sleeve 28, when the proper adjustment has been made. Pin 26a is located in bore 27a and recess 27. This pin is omitted in the lower half of Fig. 1.

When pin 26a is tightened, the bored flange of body 19 is flexed toward recess 27, so that rod F is then held against turning, unless screw 26a is loosened or suitable force is applied to hand-wheel 31, which turns in unison with rod F and sleeve 30.

The lower end of the lower body 2%} is provided with 'an external thread which is engaged by a gasket 38 by means of a nut '37. This nut 37 serves as an adaptor.

This nut 37 has an external thread 37a which engages the internal thread of the cylindrical guide 4?.

The torsion spring 15 biases the plate or lever 9 to a position in which it maintains plunger 46 and tip -14 and the lower extension 3% of rod 39 in a selected position. This spring 15 normally pushes the assembled rods F and 39 upwardly, so that the shuttle S is normally in maximum pumping position for maximum output. When the extension 3% is moved downwardly to regulate the output of the metering pump, the control spring 15 provides a resilient connection with the plunger 46, so that the plunger 46 moves downwardly in unison with the extension 391) in order to diminish the offset of pin 9:: and thus to diminish the output. The upper body 19 is fixed by means of screws Sa to a rigidly fixed plate 35 of the casing or panel of the entire system.

As the member 46 is downwardly vertically adjusted manually, it vertically adjusts the pin 14} which is in the bore 48, thus turnably adjusting the lever 9 and adjusting the position of the pin 9a in the oversized and cccentric hole H. This adjusts the shuttle S so that it now is turnable about an axis which is offset by a selected diminished distance relative to the axis of the shaft 2. The volume of liquid delivered by the respective metering pump is thus regulated.

In the present improved system, the control for the metering pump as modified according to my invention, is

a delicate manual micro-adjustment and the only outlet of the metering pump for the liquid is the outlet port 18 of the casing 1, with no control of the setting of the plunger 46 of the modified metering pump by the pres sure of the liquid within the casing 1.

In order to show the connection between the subject matter of this application and the subject matter of said prior application Serial No. 195,965 (U. S. Patent No. 2,737,961, dated March 13, 1956), Fig. 1 also shows the connection flanges 55 between the improved pump unit and an anterior pump unit.

As shown in Fig. 1, the upper body 19 has collars 29a and 29.

I claim:

1. A pump which has a pump casing in which a rotor is turnably located to rotate about a longitudinal axis, said rotor having a longitudinal cylindrical face which is interrupted by at least one transverse port and also by a longitudinal slot which extends to the front of said rotor, a channel-shaped piston which has longitudinal arms and which is open at its front edge and which is transversely slidable in said slot of said rotor, a shuttle which fits longitudinally slidably between said arms, said casing having an internal longitudinal cylindrical face in which said rotor fits save where said rotor is thus'interrupted, said shuttle having a median longitudinal recess in its front face, a front plate fixed to said casing, a lever located in front of said front plate and pivoted to and turnable relative to said front plate, a rear shuttle pin connected to said lever and extending rearwardly through an oversized hole of said front plate into said recess, said front plate being closed save where the pivot of said lever is located and save for said oversized hole, a front longitudinal pin connected to said lever and extending forwardly from said lever, an additional cover plate for said casing located in front of said lever, said additional plate being fixed to said casing, a guide fixed to said additional plate, a plunger located in said guide, said plunger having a cross-pin which has a longitudinal opening into which said front longitudinal pin extends, the turning of said lever relative to said casing determining the offset of said shuttle pin from the axis of rotation of said rotor, spring means which bias said lever to turn to a position in which said ofiset is a maximum, and adjusting means operative to adjust said plunger in said guide and thereby to adjust said lever against the force of said spring to a selected offset, said guide being sealed from said additional cover plate, said additional cover plate being free from ports, the offset of said shuttle pin from the axis of rotation of said rotor being regulated solely by the position of said plunger in said guide, and actuating means for moving said plunger in said guide in a selected direction, said actuating means being solely manually operated.

2. In combination with a pump, said pump having a casing which has a pumping chamber which has a longitudinal and cylindrical inner wall, said casing having an inlet port and an outlet port, a rotor located in said casing and having lateral ports and a front longitudinal slot and a longitudinal axis of rotation, said rotor interfitting with said cylindrical inner wall, a channel-shaped piston located in said longitudinal slot and movable transversely in said slot relative to said axis, said piston having longitudinal piston-Walls which are transversely separated and which are at opposite sides of said axis, a shuttle which is located between said walls and which interfits with said walls, said shuttle and piston being movable in unison relative to said rotor in a direction transverse to said axis, said shuttle having a front wall which has a longitudinal and median recess, a support fixed to said casing, a lever pivoted to said support along a line which is offset from said axis, said lever having a longitudinal operating pin which extends through said support and enters said recess, said support being free from ports and being closed save where said pin extends through said support, said lever being adjustable about its pivot to locate said recess on said axis or to locate said recess on a line which is offset transversely to said axis, said casing having a front wall, a cover plate fixed to said front wall, said cover plate being free from ports and passages for the flow of liquid, said cover plate having a cylindrical guide which is perpendicular to said axis, sealing means which seal said cylindrical guide from said pumping chamber, said cylindrical guide having an endopening at one end thereof, a plunger located in said cylindrical guide, a longitudinal connecting pin which is offset relative to said pivot and said operating pin and which is connected to said plunger so that the movement of said plunger in said guide turnably adjusts said lever, a closure for said end-opening, said closure having a bore, a hollow housing located in said bore, said housing having a passage which is alined With said cylindrical guide, a rod located in said passage, said rod and said passage having interengaging threads, one end of said rod abutting said plunger, spring means which press said plunger against said rod, and manual means for turning said rod to shift said rod longitudinally against the force of said spring, said manual means being the sole means for actuating said plunger.

References Cited in the file of this patent UNITED STATES PATENTS 1,547,668 Poltin July 28, 1925 1,696,139 Ferris Dec. 18, 1928 1,806,893 Cunningham May 26, 1931 2,018,692 Waite Oct. 29, 1935 2,018,693 Waite Oct, 29, 1935 2,287,097 Graham June 23, 1942 2,393,128 Temple Ian. 15, 1946 

